/* 头部模块开始 */
.box {
  overflow: hidden;
}

.header {
  position: fixed;
  top: 0px;
  left: 0px;
  right: 0px;
  z-index: 2;
  height: 60px;
  background-color: #fafafa;
  color: #292e35;
}

.header__logo {
  float: left;
  height: 40px;
  margin: 10px 0px 0px 10px;
  padding: 0px 0px 0px 50px;
  background: url('../img/logo.png') left top no-repeat;
  display: block;
  font-size: 18px;
  line-height: 40px;
}

.header__nav {
  float: right;
  margin: 10px 10px 0px 0px;
  position: relative;
}

.header__nav-item:hover {
  color: #f03131;
}

.header__nav-item {
  padding: 0 20px;
  font-size: 14px;
  display: inline-block;
  width: 60px;
  text-align: center;
  line-height: 40px;
}

.header__nav-item-tip {
  width: 60px;
  height: 2px;
  background: red;
  position: absolute;
  left: 20px;
  bottom: -2px;
}

.header__nav-item_custom_button {
  color: #fff;
  background: #000;
  width: 60px;
  margin: 0 20px;
  border-radius: 5px;
}

.header__nav-item_custom_button:hover {
  color: #fff;
}

/* 第一屏模块开始 */

.screen-1 {
  color: rgb(255, 255, 255);
  height: 800px;
  background-color: #ececec;
  text-align: center;
  background: url(../img/bg-screen-1.png) no-repeat center bottom;
  background-size: cover;
  position: relative;
}

.screen-1__wrap {
  max-width: 1200px;
  min-width: 800px;
  margin: 0px auto;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.screen-1__heading {
  position: absolute;
  top: 160px;
  width: 100%;
  font-size: 42px;
}

.screen-1__heading b {
  color: #f01414;
  font-weight: normal;
}

.screen-1__phone {
  position: absolute;
  bottom: 180px;
  width: 1375px;
  height: 305px;
  left: 50%;
  margin-left: -687px;
  background: url(../img/screen-1-phone.png) no-repeat center;
  background-size: cover;
  z-index: 1;
}

.screen-1__shadow {
  position: absolute;
  bottom: 30px;
  width: 1233px;
  height: 411px;
  left: 50%;
  margin-left: -616px;
  background: url(../img/screen-1-shadow.png) no-repeat center;
}

/* 第二屏开始 */
.screen-2 {
  color: rgb(7, 17, 27);
  height: 800px;
  background-color: #fafafa;
  text-align: center;
}

.screen-2__wrap {
  max-width: 1200px;
  min-width: 800px;
  margin: 0px auto;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.screen-2__heading {
  position: absolute;
  top: 80px;
  width: 100%;
  font-size: 42px;
  color: #f01414;
}

.screen-2__subheading {
  width: 100%;
  top: 190px;
  position: absolute;
  font-size: 16px;
}

.screen-2__phone {
  width: 800px;
  height: 873px;
  background: url(../img/bg-screen-2.png) no-repeat;
  position: absolute;
  left: 50%;
  margin-left: -464px;
  top: 270px;
}

.screen-2__point {
  font-size: 24px;
  color: #4d555d;
  position: absolute;
  width: 100px;
}

.screen-2__point_i_1 {
  top: 180px;
  left: -120px;
  padding-right: 112px;
  background: url(../img/icon-point-right.png) no-repeat center right;
}

.screen-2__point_i_2 {
  top: 37px;
  left: 584px;

  padding-left: 112px;
  background: url(../img/icon-point-left.png) no-repeat center left;
}

.screen-2__point_i_3 {
  top: 340px;
  left: 680px;

  padding-left: 112px;
  background: url(../img/icon-point-left.png) no-repeat center left;
}

/* 第三屏开始 */

.screen-3 {
  color: rgb(255, 255, 255);
  height: 800px;
  background-color: #a71316;
}

.screen-3__wrap {
  max-width: 1200px;
  min-width: 800px;
  margin: 0px auto;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.screen-3__heading {
  position: absolute;
  top: 90px;
  left: 10px;
  width: 580px;
  font-size: 36px;
}

.screen-3__subheading {
  position: absolute;
  top: 170px;
  left: 10px;
  width: 580px;
  font-size: 16px;
}

.screen-3__phone {
  width: 729px;
  height: 900px;
  position: absolute;
  top: 200px;
  left: 465px;
  background: url(../img/bg-screen-3.png) no-repeat;
}

.screen-3__features {
  position: absolute;
  width: 328px;
  height: 288px;
  bottom: 140px;
  left: 5px;
}

.screen-3__features-item-number {
  height: 36px;
  font-size: 36px;
  line-height: 36px;
  padding: 32px 0 9px 0;
  display: block;
}

.screen-3__features-item {
  float: left;
  width: 138px;
  height: 118px;
  border: 1px solid #d97173;
  border-radius: 3px;
  text-align: center;
  line-height: 14px;
  font-size: 14px;
  margin: 0 24px 24px 0;
  color: #fff;
}

/* 第四屏开始 */
.screen-4 {
  background-color: #fff;
  text-align: center;
  height: 800px;
}

.screen-4__wrap {
  max-width: 1200px;
  min-width: 800px;
  margin: 0px auto;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.screen-4__heading {
  position: absolute;
  top: 80px;
  width: 100%;
  font-size: 42px;
  color: #f01414;
}

.screen-4__subheading {
  position: absolute;
  top: 180px;
  width: 100%;
  font-size: 16px;
}

.screen-4__type {
  width: 1300px;
  margin-left: 30px;
  height: 270px;
  bottom: 220px;
  position: absolute;
  font-size: 16px;
  text-align: center;
}

.screen-4__type-item {
  width: 220px;
  height: 270px;
  float: left;
  margin-right: 90px;
  position: relative;
}

.screen-4__type-item-name {
  width: 100%;
  height: 40px;
  position: absolute;
  top: 300px;
  font-size: 16px;
  height: 16px;
  line-height: 16px;
  color: #2c3238;
}

.screen-4__type-item-storage {
  width: 100%;
  height: 40px;
  position: absolute;
  top: 328px;
  font-size: 9px;
  height: 9px;
  line-height: 9px;
  color: #93999f;
}

.screen-4__type .photo {
  width: 240px;
  height: 270px;
  position: absolute;
  left: 0;
  top: 0;
}

.screen-4__type-item_i_1 {
  background: url('../img/phone-1.png') center left no-repeat;
}

.screen-4__type-item_i_2 {
  background: url('../img/phone-2.png') center left no-repeat;
}

.screen-4__type-item_i_3 {
  background: url('../img/phone-3.png') center left no-repeat;
}

.screen-4__type-item_i_4 {
  background: url('../img/phone-4.png') center left no-repeat;
}

/* 第五屏开始 */
.screen-5 {
  height: 800px;
  text-align: center;
  overflow: hidden;
  background: #d9dde1;
  position: relative;
}

.screen-5__back {
  width: 100%;
  height: 370px;
  background: url(../img/bg-screen-5.png) no-repeat bottom center;
  background-size: cover;
  position: absolute;
  bottom: -100px;
}

.screen-5__wrap {
  max-width: 1200px;
  min-width: 800px;
  margin: 0px auto;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.screen-5__heading {
  position: absolute;
  top: 180px;
  width: 100%;
  font-size: 42px;
  color: #f01414;
}

.screen-5__subheading {
  position: absolute;
  top: 270px;
  width: 100%;
  font-size: 16px;
}

.buy {
  height: 80px;
  padding: 120px 0px;
  background: url(../img/bg-screen-buy.png) no-repeat bottom center #2b333b;
}

.buy__button:hover,
.buy__button {
  width: 240px;
  height: 80px;
  line-height: 80px;
  text-align: center;
  font-size: 24px;
  color: #fff;
  border-radius: 3px;
  margin: 0px auto;
  display: block;
  background-color: #f01414;
  transition: all 0.5s;
}

.buy__button:hover {
  box-shadow: 0 10px 10px rgba(0, 0, 0, 0.5);
  transform: translate(0, -5px);
}

/*页脚模块开始*/
.footer {
  height: 80px;
  line-height: 80px;
  background-color: #07111b;
  text-align: center;
  color: #fff;
}

/*大纲模块*/

.outline {
  position: fixed;
  padding: 5px 10px;
  bottom: 120px;
  right: 0;
  z-index: 1;
  background-color: #fff;
  box-shadow: 0px 4px 12px 0px rgba(7, 17, 27, 0.1);
}

.outline__item {
  display: block;
  width: 40px;
  height: 30px;
  line-height: 30px;
  padding: 5px 0;
  background: rgb(255, 255, 255);
  margin: 5px 0px 0px;
  border-top: 1px solid #eee;
  text-align: center;
  color: #93999f;
}

.outline__item:first-child {
  border: none;
}

.outline__item_status_active {
  color: #000;
}
